Date-indicator for clocks.



S. BAUMGARTNER-HARTMANN.

DATE INDICATOR FOR CLOCKS.

APPLICATION FILED 001225, 1911.

1,027,5 18. Patented May 28, 1912.

I 6 6 j V1 mrenlor 1 I/ JMwbb/ziaam MM'MMM Wm UNITED STATES PATENTOFFICE.

SEBASTIAN BAUMGARTNER-HARTMANN, OF ZOLLIKON, SWITZERLAND.

DATE-INDICATOR FOR CLOCKS.

To all whom it may concern Be it known that vI, SEBASTIAN BA MGARTNER-HARTMANN, a citizen of the Republie of Switzerland, and aresident of Zollikon, Canton Zurich, Switzerland, have invented certainImprovements in DateIndicators for Clocks, of which the following is aspecification.

My invention relates to a date indicator which is connected eitherdirectly or inclirectly to a clock so as to be controlled thereby forindicating the date automatically.

The invention consists in the construction and combination of parts ashereinafter set forth and claimed, its object being to provide anindicator which is simple in its construction and reliable in itsoperation.

In the accompanying drawing the invention is illustrated by way ofexample, the indicator being shown as an independent structure.

Figure 1 of said drawing represents a front view of the apparatus insection on the line AB of Fig. 2, which is a plan of the apparatuswithout top-cover.

' The apparatus consists of a rectangular casing having side-walls 1, abottom 2, a horizontal partition 3 and a detachable topcover 4. Thepartition 3 divides the casing into two compartments C and D of whichthe upper one C is the largest. Two vertical spindles 5 and 6 arerotatably held in the bottom 2 and in the partition 3 and serve for thereception of a paper strip 23 which is reeled from one spindle to theother. The paper strip is held on the spindles in the compartment C bymeans of bobbins 22 which are supported on the partition 3 by means ofdisks 7 the latter as well as the bobbins being squared on the spindles.Underneath the partition 3 the spindle 6 has a toothed wheel 9 whichgears with a wheel 10 connected to a spring barrel 11. The latter isfitted on a separate shaft and is adapted to be wound up in knownmanner. The spindle 5 carries a circular disk 8 in the compartment Dwhich disk has in its edge a notch 29. This notch is normally engaged bya pin 19 connected to a pivoted lever 18,

Specification of Letters Patent. Application filed October 25, 1911.Serial. No. 656,750.

Patented May 28,1912.

pin 19 in engagement with the notch 29. The opposite arm of the lever 15is located near the edge of a wheel 13 the shaft 12 of which is soconnected to the works of a clock as to complete its revolution in 2Lhours. On the edge of the wheel 13 a tooth 14: is provided which isadapted to engage the lever 15 and turn it, together with the lever 18,in opposition to the spring 20, so as to disengage the pin 19 from thenotch 29. Each such disengagement, however, is only sufficient forallowing the disk 8 to complete one revolution under the influence ofthe paper strip and of the spring barrel 11. From this arrangement itfollows that the strip 23 will be reeled through a certain distance fromthe spindle 5 t0 the spindle 6 once in 24 hours.

The strip is printed in known manner with date numbers distributedthroughout its length, the distance between such numbers being such thata fresh number is brought into- View by each movement of the strip. Thedistance between the numbers must be gradually decreased toward thespindle 5 to compensate for the reduction in the feed as the reel growssmaller. An opening is provided in the front wall of the casing to allowthe numbers to be read ofi. Angularly disposed walls 24 are carried fromsaid opening toward the strip to guide the view and prevent more thanone number being visible at a time.

With this arrangement and construction of the parts it is evident that afresh number will appear on the indicator each day.

When, at the end ofthe quarter of the year, the strip has been reeled01f, the cover 4 is removed and the old strip replaced by a fresh one,this being, owing to the disposition of the spindles, a very simpleoperation.

I claim A date indicator for clocks, comprising a casing having adetachable cover, a horizontal partition dividing said easing into twocompartments, two spindles rotatably held in said partition and in thebottom of the casing so that their upper ends are left free in the uppercompartment, disks connected to the spindles in said upper compartmentfor supporting thereon the reels of a paper strip bearing the datenumbers, a spring barrel in the lower compartment acting on one of thespindles so as to move the strip, a disk mounted on the other spindle inthe lower compartment, a pivoted lever having a pin normally inengagement With a notch in said disk so as to hold the strip stationary,a Wheel connected to the clock so as to be rotated by the latter aboutits axis once in 2% hours, a double-armed spring-actuated lever havingone end disposed at the edge of said Wheel and the other end connectedby a rod to said aforementioned lever, and a tooth on said Wheeldisposed so as to rock said levers once during a revolution anddisengage said 10 SEBASTIAN BAUMGARTNER-HARTMANN.

WVitnesses:

ARTHUR J. BUNDY, AUGUST Blonds.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

